package com.heima;

import org.apache.kafka.clients.producer.*;

import java.util.Properties;
import java.util.concurrent.Future;

public class ProducerQuickStart {

    public static void main(String[] args) {
        //1.kafka的配置信息
        Properties properties = new Properties();
        //kafka的连接地址
        properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,"192.168.137.136:9092");
        //发送失败，失败的重试次数
        properties.put(ProducerConfig.RETRIES_CONFIG,5);
        //消息key的序列化器
        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,"org.apache.kafka.common.serialization.StringSerializer");
        //消息value的序列化器
        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,"org.apache.kafka.common.serialization.StringSerializer");

        //2.生产者对象
        KafkaProducer<String,String> producer = new KafkaProducer<String, String>(properties);

        //封装发送的消息
        ProducerRecord<String,String> message = new ProducerRecord<String, String>("itheima-topic","hello kafka");

        //3.发送消息
        Future<RecordMetadata> send = producer.send(message);
        Future<RecordMetadata> send1 = producer.send(message, new Callback() {
            @Override
            public void onCompletion(RecordMetadata metadata, Exception exception) {

            }
        });

        //4.关闭消息通道，必须关闭，否则消息发送不成功
        producer.close();

        System.out.println("消息发送完成");
    }
}
